12661293793 has 2 divisors, whose sum is σ = 12661293794. Its totient is φ = 12661293792.

The previous prime is 12661293769. The next prime is 12661293839. The reversal of 12661293793 is 39739216621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12635558464 + 25735329 = 112408^2 + 5073^2 .

It is a cyclic number.

It is not a de Polignac number, because 12661293793 - 2¹³ = 12661285601 is a prime.

It is not a weakly prime, because it can be changed into another prime (12661290793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6330646896 + 6330646897.

It is an arithmetic number, because the mean of its divisors is an integer number (6330646897).

Almost surely, 2^12661293793 is an apocalyptic number.

It is an amenable number.

12661293793 is a deficient number, since it is larger than the sum of its proper divisors (1).

12661293793 is an equidigital number, since it uses as much as digits as its factorization.

12661293793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 49.

The spelling of 12661293793 in words is "twelve billion, six hundred sixty-one million, two hundred ninety-three thousand, seven hundred ninety-three".